Improvement in saw-swaging devices



E. F. HENiS.

Saw-Swagng Devices.

Patented Jan. 7, 1873.

UNITED STATES PATENT OEEIcE.

CHARLES F. HENIS, OF BALTIMORE, MARYLAND.

IMPROVEMENT INl SAW-SWAGING DEVICES.

Specification forming part of Lettfrs Patent No. 134,666, dated January7, 1873.

CASE A.

To all whom t may concern: A

Beit known that I, CHARLES F. HENrs, of the city and county of Baltimoreand State of Maryland, have invented a new and Improved Saw-SwagiugDevice; and I do hereby declare the following to be a full and exactdescription of the same, reference being had to the accompanying drawingforming part of this specification, in which- Figure l is a sideelevation of the whole apparatus applied to a saw; Fig. 2 is an end viewof the same; Fig. 3 is a longitudinal section through the swage andholder; and Fig. 4 is an elevation of the face of the part B of theswage.

Similar letters of reference in the accompanyn g drawing denote the sameparts.

This invention belon gs to that class of swages employed for sharpeningand setting the teeth of saws; and it has for its object to improve theconstruction of such a swage in such manner that, first, the swage shallbe prevented both from becomingloosened in its holder and from theforcing of either of its parts past the other in the holder by the blowsgiven to the latter; second, that all the teeth of the saw shall receivethe same edge and set, and also a set equal on both sides; third, thatthe swageholder, and also the rider that sits on the sawteeth, shall besecurely fastened in the arm that supports both; and, fourth, that thesaid arm shall straddle the saw and support the holder at all timesparallel to the plane of the saw in order to swage and set all the teethuniformly. To this end the invention consists, first, in a conical swagemade in two parts which are pivoted together and placed in a conicalrecess in the swage-holder; second, in a swage having a recess with asymmetrical flare at each side; third, in the combination, with theswageholder and the arm which supports it, of a sliding pin to hold thetwo together; fourth, in the combination, with the rider and the armwhich supports it, of a device for lookin g the nut which fastens therider to the arm; fifth, in the combination, with the swage-holder, of abifurcated arm which straddles the saw.

In the drawing, A is the swage-holder, which needs no specificdescription except in the particulars hereinafter mentioned. The swageis made in two longitudinal halves, B C, which, when detached from theholder. swing freely past each on a pivot, a. This pivot not only servesto keep the parts B G together when removed from the holder, but also toprevent either part bein g forced past the other in the holder under theimpact of the blows bestowed upon the latter during the process ofswaging the saw-teeth. The swage, as a whole, is made conical, and fitsin a conical recess in the end.

of the holder. This construction prevents the swage from working loosein the holder during the process of hammering, as the harder the holderis struck the tighter the swage gets. The recess in the end of the swageis made with a narrow part', b, of just the width ofthe saw, and a widerpart, c, which has an equal flare to each side of the part b. The pointc receives the points of the teeth and gives them a set which is thesame for all the teeth, and equal on both sides of each tooth. A hole,d, made transversely through the head of the holder, and communicatingwith the inner end of the recess therein, admits atool, which, whendriven against the conical side of the swage, forces it out of theholder. The shank of the holder fits loosely the eye D of a bifurcated yarm, D', which straddles the saw and thus centers the holder. The eye Dis fastened at any desired point of the holder by means of a pin, e,entering either one of several holes made in aline in the under side ofthe shank, and placed between the forks ff of the arm D', the lower endof the pin entering a hole in the top of the rider F. The pin e bears across-piece, 71 which extends between the forks f, and has also lugs nwhich enter slots f in the forks f. A spring, 7c, incloses the pin e andbears against the orosspiece h, thus keeping the pin in place in theshank, and also allowing it to be withdrawn from the shank at pleasure.The rider F is supported upon a metal block placed between the forks fand passing through the slot f in one of them. Said block has a head, l,outside of the fork, through which it passes, and also a threaded bolt,l', passing through the other slotf, on which bolt, outside of the fork,is a milled nut, m, by which the forks can be tightened on the rider. Toprevent the nut from being loosened by the jar of the blows in swaging,I provide a lookin g device, consisting of a cross-bar, o, placed on thepin e and extending between the forks f, from which crossbar an arm, r,extends through the adjacent slot f', said arm being bent downward andfurnished at its outer end with teeth, which engage with the milled nutand stop it from turning backward.

What I claim as new is 1. A conical saw-swage, in combination with aswage-holder having a conical recess for its reception, when the saidswage is made in two parts which are connected together by a pivot, asspecied.

2. The saW-swage made in two parts, connected together, and-inserted inthe swage-` holder, and having a recess daring symmetrically at eachside, substantially as described.

3. A conical saw-swage composed of two longitudinal parts pivotedtogether and having an end recess formed partly in each to receive thepoint of a saw-tooth, substantially as arm D', and a sliding pin tofasten the arm upon the holder, substantially as explained.

5. The combination of the arm D', rider F, nut m, nut-lock o i", and aspring, all arranged as described.

6. The combination of the swage-holder A and bifurcated arm D', asspecified.

7. A saw-swage held upon .the teeth in the plane of the saw by means ofthe recess in the sWage-holder, the adjustable bifurcated arm, and theadjustable rider, substantially as described, and for the purposespecified.

Y CHARLES F. HENIS.

Witnesses:

MELVILLE CHURCH, N. K. ELLswoRTH.

